ci(fork): run PR checks when a PR is retargeted or marked ready

.github/workflows/fork-ci.yml

@@ -32,6 +32,12 @@ on:
   # integrationOverlays is empty: the overlays were drained into fork/dev at
   # cutover. Re-add bases here if one is ever registered again.
   pull_request:
+    # Explicit, because the default set (opened, synchronize, reopened) misses
+    # both ways a PR can become eligible without a new commit: being marked
+    # ready, and being retargeted onto a listed base. A PR retargeted from a
+    # branch this workflow does not watch would otherwise sit forever on
+    # required checks that can never report.
+    types: [opened, synchronize, reopened, ready_for_review, edited]
     branches:
       - fork/base
       - fork/tim
@@ -58,6 +64,11 @@ concurrency:
 jobs:
   check:
     name: Check
+    # "edited" also fires for title and body edits, which must not spend a full
+    # CI run. github.event.changes.base is present only when the base changed.
+    if: >-
+      github.event_name != 'pull_request' || github.event.action != 'edited' ||
+      github.event.changes.base != null
     runs-on: ubuntu-24.04
     timeout-minutes: 10
     steps:
@@ -109,6 +120,11 @@ jobs:
 
   test:
     name: Test
+    # "edited" also fires for title and body edits, which must not spend a full
+    # CI run. github.event.changes.base is present only when the base changed.
+    if: >-
+      github.event_name != 'pull_request' || github.event.action != 'edited' ||
+      github.event.changes.base != null
     runs-on: ubuntu-24.04
     timeout-minutes: 10
     steps:
@@ -132,6 +148,11 @@ jobs:
 
   mobile_native_static_analysis:
     name: Mobile Native Static Analysis
+    # "edited" also fires for title and body edits, which must not spend a full
+    # CI run. github.event.changes.base is present only when the base changed.
+    if: >-
+      github.event_name != 'pull_request' || github.event.action != 'edited' ||
+      github.event.changes.base != null
     runs-on: macos-15
     timeout-minutes: 10
     steps:
@@ -170,6 +191,11 @@ jobs:
 
   release_smoke:
     name: Release Smoke
+    # "edited" also fires for title and body edits, which must not spend a full
+    # CI run. github.event.changes.base is present only when the base changed.
+    if: >-
+      github.event_name != 'pull_request' || github.event.action != 'edited' ||
+      github.event.changes.base != null
     runs-on: ubuntu-24.04
     timeout-minutes: 10
     steps: